* Show graph legend via 'legend' command or '?' button in the lower right corner
* Legend is not interactive: nodes and edges not clickable or moveable
* CXX and Java node types are mixed
* fixed intermediatestorage merges might lose file indexed/complete information
* fixed changing file complete to true only possible if the file has no errors
* fixed clicking show errors for a file where no asociated errors were found showed all errors
* also changed xml elements in sourcegroup settings that specify the used language standard, so that one sourcegroup can maintain multiple language standards
* added migration and migrated sample projects
* fixed section mentioning hatched elements in tutorial
* mention call/inheritance graphs in tutorial
* added new tut files to windows deployment package
* fixed error columns are not saved to database correctly
* implemented setting JRE System Library paths in app settings
* added detector for JRE System Library that not use Java Runtime specified in AppSettings but detects JRE on its own by reusing the JavaPathDetector.
* added option to use JRE System Library in JavaSourceGroup
* Show declname in java import error
* Don't clear window stack when saving preferences
* Fixed spacing in source group UI, status view and error view
* Resize graph scene rect when widget is resized
* Graph node centering respect no animation preference
* Fixed undoing of view commands
* Avoid scrollbar jump when restoring graph scroll position
* Deactivate local symbols in code when clicking into empty space
* Turned QtProjectWizzard into window for Source Group ui
* Clicking into FilePicker when empty will open dialog right away
* Fixed environment variable use throughout all Source Group path values
* Moved Preferences to QtPreferencesWindow
bug id = 230
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* NameHierarchy now looks like this: <delimiter>\tm<all the rest>
* made new baseclasses for SettingsMigration and SettingsMigrator
* Use the migration system for SqliteBookmarkStorage as well
* fixed NameHierarchy delimiter not set when project settings need to be migrated
* fixed codeview does not scroll to linenumber in single file mode when activating symbol in changed file
* fixed - to _ in color schemes
* fixed yoda talk in Tutorial
* fixed graph node with no children but qualifier has expand toggle
* added placeholder and file filter for maven detection on MacOS
* fixed NameHierarchy delimiter wrong in SearchIndex
* project can not have multiple source groups with different types
* language of a project is now inferred from source groups
* setting global NameHierarchy delimiter of first sourceGroup in project
* added project settings migrations for source groups
* Add Settings Migration classes (MoveKey, DeleteKey, Lambda)
* Update sample projects with migrations
* added method to config to retrieve sublevel key names
* implemented recursive removing of keys in settings
* moved project files out of top level
* removed solution parsing code as it is not used anymore
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* moved sample projects from data to user folder
* added fallback files for app and window settings
* implemented copying app and window settings to user folder when not found on app startup
* fixed upgrading for windows installer
